Improvement in securing cap-plates to lock-cases



B. ERBE.I

HvScuri'rng YCap-Pilates to Lock-Gases. 'NWN-7,051. Patented Feb.3,1874.

UNITED STATES PATENLQEETQE.

EAETHEL ERBE, or riTTsEunc., rENNsYnvANrA.

IMPROVEMENT IN SECURING GAP-PLATES TO LOCK-CASES.

Specification forming partof Letters Patent No. 111.74351,` datedFebruary 3, 1874; application filed December 4, 1873.

clear, and exact description thereof, reference A being had to theaccompanying drawing, forniing a part of this specification, in which-Figure 1 is a perspective view of the latch portion of the 4case withthe cap-plate removed. Fig. 2 is a section through m a', Fig. l. Fig. 3is a view of the under side of the cap.

My invention consists of a lock, in which the cap is secured to the caseby means of a hook or key cast on one part, engaging a correspondingslide, socket, or catch cast on the other part, the joint being made bysliding the engaging points into or under each other, and the engagingpoints being entirely inside of the case, so vthat the attachment ismade without a screw or rivet hole through the cap. To enable othersskilled in the art to make and use my improvement, I will describe itsconstruction and manner of use.

The parts contained in the case a are of the usual construction. brepresents the cap c, the latch-bolt, which is attached to the yoke d,and provided with a round shank, by which it may be reversed therein.The follower e operates in the usual way. Heretofore the p cap b hasbeen seonred upon the case a by means of a screw or other deviceextending through it. Instead of this, I form upon the case a a T heador hook f, the upper face .of which stands parallel to the edges of thecase. Upon the opposite port-ion of the cap b I form a slide or catch,g, composed of two overlapping` lips. At the rear end of the cap bis astop, i, having an inclined inner side. The front edge b of the cap bforms one ofthe bearings of the latch-head c. In order to attach the capI slide it onto the case a from its rear end forward. This causes thehook f to engage the catch g, and thereby secure these parts together.When the cap has been pushed forward its full extent, the inclined stopfi, sliding on the rear edge of the case, drops into it, and holds thecap from any lateral displace ment. If it is desired to remove the cap,it is only necessary to spring it slightly up at its back end, when thestop z' will slip over the rear edge of the case, and permit the withadrawal of the cap. The catch g is made of suficient length, and the stopi is placed at a sufiicient distance from the rear edge of the case toallow the cap b to be moved back to the position shown by the brokenlines in Fig. 1. This removes the bearing from one side of thelatch-head c', so that the latter may be reversed at pleasure. Theportion of the front edge of the case a, which forms the bearing of oneor two sides of the latch-head c', may be cast along with the cap, asshown in Fig. 3, so that by the lateral movement of the cap upon itsslide the Alatch-head c will be freed upon two sides, making theoperation of reversing still easier.

The engaging points or fastening may be cast on any suitable andconvenient part of the inside of the lock.

This method of fastening the case together enables Ine to dispense withthe screw-hole heretofore necessary, saves much trouble in joining theparts and in reversing the latch, is a secure fastening, and gives aneater and cheaper article.

The engaging lugs or hooks are cast along with the case and cap, andthereby I save the labor and expense of a subsequent operation, such asdrilling and tapping the screw-hole, heretofore necessary.

lhat I claim as my invention, and desire to secure by Letters Patent,is-

A lock, the case and cap of which are fastened together by a hook caston one part sliding into and engaging a catch cast 011 the other, suchengaging points being entirely i11- side the lock, substantially asdescribed.

In testimony whereof, I, the said BARTHEL ERBE, have hereunto set myhand.

BARTHEII ERBE.

IVitnesses T. B. KEER, JAMES I. KAT.

